52 citations · 87 across the 38 of their papers we have counts for
25 papers · 1 filter
Towards Energy-Neutral IoT Sensors: Low-Cost Chirp-Based Backscattering Node Using a COTS Microcontroller and Multi-Load Front-End
Tijl Schepens, Liesbet Van der Perre, Gilles Callebaut
Backscatter communication has proven to be a key enabler for energy-neutral sensor nodes in the IoT. It allows ultra-low-power nodes to transmit sensor data by reflecting incident…
Long-Range Backscatter: A Bottom-Up Approach
Tijl Schepens, Gilles Callebaut, Liesbet Van der Perre
Continued progress towards energy-neutral Internet of Things (IoT) nodes expose the wireless communication link as the dominant energy bottleneck. While low-power wide-area network…
RF-Powered Batteryless Plant Movement Sensor for Precision Agriculture
Jona Cappelle, Jarne Van Mulders, Sarah Goossens +5
Precision agriculture demands non-invasive, energy-efficient, and sustainable plant monitoring solutions. In this work, we present the design and implementation of a lightweight, b…
Distributed Deployment and Dual-Frequency Concepts to Strengthen Sub-THz Wireless Systems
Liesbet Van der Perre, Gilles Callebaut, Thomas Eriksson +5
The vast bandwidth available at sub-THz frequencies holds great promise for high-speed wireless access, precise localization, and advanced sensing applications. However, fundamenta…
Physically Large Apertures for Wireless Power Transfer: Performance and Regulatory Aspects
Benjamin J. B. Deutschmann, Ulrich Muehlmann, Ahmet Kaplan +7
Wireless power transfer (WPT) is a promising service for the Internet of Things, providing a cost-effective and sustainable solution to deploy so-called energy-neutral devices on a…
Experimental Study on the Effect of Synchronization Accuracy for Near-Field RF Wireless Power Transfer in Multi-Antenna Systems
Gilles Callebaut, Jarne Van Mulders, Bert Cox +4
Wireless power transfer (WPT) technologies hold promise for enhancing device autonomy, particularly for energy-limited IoT systems. This paper presents experimental results on cohe…
How to Perform Distributed Precoding to Wirelessly Power Shelf Labels: Signal Processing and Measurements
Gilles Callebaut, Jarne Van Mulders, Bert Cox +3
Wireless power transfer (WPT) has garnered increasing attention due to its potential to eliminate device-side batteries. With the advent of (distributed) multiple-input multiple-ou…
MmWave for Extended Reality: Open User Mobility Dataset, Characterisation, and Impact on Link Quality
Alexander Marinsek, Sam De Kunst, Gilles Callebaut +2
User mobility in extended reality (XR) can have a major impact on millimeter-wave (mmWave) links and may require dedicated mitigation strategies to ensure reliable connections and…
IoT on the Road to Sustainability: Vehicle or Bandit?
Jona Cappelle, Liesbet Van der Perre, Emma Fitzgerald +5
The Internet of Things (IoT) can support the evolution towards a digital and green future. However, the introduction of the technology clearly has in itself a direct adverse ecolog…
Energy Reduction in Cell-Free Massive MIMO through Fine-Grained Resource Management
Özlem Tuğfe Demir, Lianet Méndez-Monsanto, Nicola Bastianello +2
The physical layer foundations of cell-free massive MIMO (CF-mMIMO) have been well-established. As a next step, researchers are investigating practical and energy-efficient network…
An Open Dataset Storage Standard for 6G Testbeds
Gilles Callebaut, Michiel Sandra, Christian Nelson +7
The emergence of sixth-generation (6G) networks has spurred the development of novel testbeds, including sub-THz networks, cell-free systems, and 6G simulators. To maximize the ben…
6G Radio Testbeds: Requirements, Trends, and Approaches
Gilles Callebaut, Liang Liu, Thomas Eriksson +3
The proof of the pudding is in the eating - that is why 6G testbeds are essential in the progress towards the next generation of wireless networks. Theoretical research towards 6G…
The Z3RO Family of Precoders Cancelling Nonlinear Power Amplification Distortion in Large Array Systems
François Rottenberg, Gilles Callebaut, Liesbet Van der Perre
Large array systems use a massive number of antenna elements and clever precoder designs to achieve an array gain at the user location. These precoders require linear front-ends, a…
Techtile -- Open 6G R&D Testbed for Communication, Positioning, Sensing, WPT and Federated Learning
Gilles Callebaut, Jarne Van Mulders, Geoffrey Ottoy +4
New concepts for next-generation wireless systems are being developed. It is expected that these 6G and beyond systems will incorporate more than only communication, but also sensi…
Array Placement in Distributed Massive MIMO for Power Saving considering Environment Information
Yi-Hang Zhu, Gilles Callebaut, Liesbet Van der Perre +1
Distributed massive MIMO (D-mMIMO) has been considered for future networks as it holds the potential to offer superior capacity while enabling energy savings in the network. A D-mM…
Z3RO Precoder Canceling Nonlinear Power Amplifier Distortion in Large Array Systems
François Rottenberg, Gilles Callebaut, Liesbet Van der Perre
Large array-based transmission uses the combination of a massive number of antenna elements and clever precoder designs to achieve array gain and spatially multiplex different user…
Grant-Free Random Access in Massive MIMO for Static Low-Power IoT Nodes
Gilles Callebaut, Liesbet Van der Perre, François Rottenberg
Massive MIMO is a promising technology to enable a massive number of Internet of Things nodes to transmit short and sporadic data bursts at low power. In conventional cellular netw…
Spatial Distribution of Distortion due to Nonlinear Power Amplification in Distributed Massive MIMO
François Rottenberg, Gilles Callebaut, Liesbet Van der Perre
Due to the nonlinearity of power amplifiers (PAs), the transmit signal is distorted. Previous works have studied the spatial distribution of this distortion for a central massive M…
Array Placement in Distributed Massive MIMO for power saving considering Radiation Pattern
Yi-Hang Zhu, Laura Monteyne, Gilles Callebaut +2
A distributed antenna system (DAS) consists of several interconnected access points (APs) which are distributed over an area. Each AP has an antenna array. In previous studies, the…
Experimental Exploration of Unlicensed Sub-GHz Massive MIMO for Massive Internet-of-Things
Gilles Callebaut, Sara Gunnarsson, Andrea P. Guevara +3
Due to the increase of Internet-of-Things (IoT) devices, IoT networks are getting overcrowded. Networks can be extended with more gateways, increasing the number of supported devic…
A Primer on Techtile: An R&D Testbed for Distributed Communication, Sensing and Positioning
Gilles Callebaut, Jarne Van Mulders, Geoffrey Ottoy +1
The Techtile measurement infrastructure is a multi-functional, versatile testbed for new communication and sensing technologies relying on fine-grained distributed resources. The f…
Massive MIMO goes Sub-GHz: Implementation and Experimental Exploration for LPWANs
Gilles Callebaut, Sara Gunnarsson, Andrea P. Guevara +4
Low-Power Wide-Area Networks operating in the unlicensed bands are being deployed to connect a rapidly growing number of Internet-of-Things devices. While the unlicensed sub-GHz ba…
LoRa Physical Layer Evaluation for Point-to-Point Links and Coverage Measurements in Diverse Environments
Gilles Callebaut, Guus Leenders, Chesney Buyle +2
This paper focuses on Point-to-Point LoRa connections. We report on coverage measurements performed in three distinct environments, i.e., coastal, forest and urban. Our field exper…
Remote IoT devices: sleepy strategies and signal processing to the rescue for a long battery life
Gilles Callebaut, Geoffrey Ottoy, Guus Leenders +3
Long range wireless connectivity opens the door for new IoT applications. Low energy consumption is essential to enable long autonomy of devices powered by batteries or even relyin…